CVE-2021-24977— Use Any Font < 6.2.1 - Unauthenticated Arbitrary CSS Appending
Quick assessment
Affected
Unknown Use Any Font | Custom Font Uploader
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
WordPress是WordPress（Wordpress）基金会的一套使用PHP语言开发的博客平台。该平台支持在PHP和MySQL的服务器上架设个人博客网站。 WordPress plugin Custom Font Uploader 存在安全漏洞，该漏洞源于后端缺乏清理和转义。攻击者可利用该漏洞导致存储型 XSS 问题。
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1133 · External Remote Services
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2021-24977
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Use Any Font < 6.2.1 - Unauthenticated Arbitrary CSS Appending
Source: CVE Program / CVE List V5
Vulnerability Description
The Use Any Font | Custom Font Uploader WordPress plugin before 6.2.1 does not have any authorisation checks when assigning a font, allowing unauthenticated users to sent arbitrary CSS which will then be processed by the frontend for all users. Due to the lack of sanitisation and escaping in the backend, it could also lead to Stored XSS issues
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress是WordPress（Wordpress）基金会的一套使用PHP语言开发的博客平台。该平台支持在PHP和MySQL的服务器上架设个人博客网站。 WordPress plugin Custom Font Uploader 存在安全漏洞，该漏洞源于后端缺乏清理和转义。攻击者可利用该漏洞导致存储型 XSS 问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Unknown | Use Any Font | Custom Font Uploader | 6.2.1 ~ 6.2.1 | - |
|
II. Public POCs for CVE-2021-24977
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2021-24977
请登录查看更多情报信息。
Vendor Advisories for CVE-2021-24977 (1)
Same Patch Batch · Unknown · 2022-02-28 · 37 CVEs total
| CVE-2022-0328 | Simple Membership < 4.0.9 - Arbitrary Member Deletion via CSRF | |
| CVE-2021-25034 | WP User < 7.0 - Reflected Cross-Site Scripting | |
| CVE-2021-25042 | WP Visitor Statistics (Real Time Traffic) < 5.5 - Arbitrary IP Address Exclusion to Stored | |
| CVE-2021-25081 | WP Google Map < 1.8.4 - Arbitrary Post Deletion and Plugin's Settings Update via CSRF | |
| CVE-2021-25112 | WHMCS Bridge < 6.4b - Reflected Cross-Site Scripting (XSS) | |
| CVE-2021-25118 | Yoast SEO 16.7-17.2 - Unauthenticated Full Path Disclosure | |
| CVE-2021-4222 | WP Paginate < 2.1.4 - Admin+ Stored Cross-Site Scripting | |
| CVE-2022-0150 | WP Accessibility Helper (WAH) < 0.6.0.7 - Reflected Cross-Site Scripting (XSS) | |
| CVE-2022-0189 | WP RSS Aggregator < 4.20 - Reflected Cross-Site Scripting (XSS) | |
| CVE-2021-25011 | WP Google Map < 1.8.1 - Subscriber+ Arbitrary Post Deletion and Plugin's Settings Update | |
| CVE-2022-0345 | Better Notifications for WP < 1.8.7 - Email Address Disclosure | |
| CVE-2022-0360 | WP Ultimate CSV Importer < 6.4.3 - Admin+ Stored Cross-Site Scripting | |
| CVE-2022-0377 | LearnPress < 4.1.5 - Arbitrary Image Renaming | |
| CVE-2022-0383 | WP Review Slider < 11.0 - Admin+ SQL Injection | |
| CVE-2022-0385 | Crazy Bone <= 0.6.0 - Unauthenticated Stored XSS | |
| CVE-2022-0411 | Asgaros Forum < 2.0.0 - Subscriber+ Blind SQL Injection | |
| CVE-2022-23911 | AP Custom Testimonial < 1.4.8 - Admin+ SQL Injection | |
| CVE-2022-23912 | AP Custom Testimonial < 1.4.8 - Reflected Cross-Site Scripting | |
| CVE-2021-24898 | EditableTable <= 0.1.4 - Admin+ Stored Cross-Site Scripting | |
| CVE-2021-24688 | Orange Form <= 1.0.1 - Unauthenticated Arbitrary Post Deletion |
Showing top 20 of 37 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same vendor: Unknown
-
CVE-2026-77115
Brave Popup Builder < 0.8.6 - Unauthenticated Reflected XSS -
CVE-2026-77116
Brave Popup Builder < 0.8.6 - Subscriber+ Unpublished Popup -
CVE-2026-77003
Content Mask 1.8.0 - 1.8.5.4 - Contributor Publish Capabilit -
CVE-2026-14853
WooCommerce Bookings < 3.9.0 - Subscriber+ Draft Bookable Pr -
CVE-2026-13598
RestrictMate < 1.3.0 - Unauthenticated Privilege Escalation
Same weakness: CWE-862
-
CVE-2026-66109
SKYSEA Client View缺失权限验证漏洞 -
CVE-2026-78467
Fluent Support Pro <= 2.3.1 - Missing Authorization -
CVE-2026-19892
InfusedWoo Pro <= 5.1.18 - Authenticated (Subscriber+) Privi -
CVE-2026-75930
FundEngine <= 1.8.1 - Missing Authorization to Authenticated -
CVE-2026-75982
LearnPress <= 4.4.4 - Missing Authorization to Authenticated
V. Comments for CVE-2021-24977
No comments yet